root path doesn't work with php include

Question

/ in the beginning of a link to get to the root folder doesn\'t work in php include.

for example \"/example/example.php\"

What is the solution?

Answer 1

some versions of PHP may have the delimiter at the end of document root while others may not. As a practical matter you may want to use:

    $r = trim(filter_input(INPUT_SERVER, 'DOCUMENT_ROOT', FILTER_SANITIZE_STRING));
    if (substr($r, 0, 1) == '/')
    {
      define("PATCH_SEPARATOR", "/");  
    }
    else
    {
      define("PATCH_SEPARATOR", "\\");    
    }

    if (substr($r, -1) == PATCH_SEPARATOR)
    {
      include_once ($r . 'example/example.php');
    }
    else
    {
      include_once ($r . PATCH_SEPARATOR . 'example/example.php');
    }